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Originally the Walter turbo prop was designed for the harsh Russian environment with limited field maintenance. The engine does not require a hot section inspection, and requires only an inspection every 300 hours.

First run in 1967, the Walter M601 is a turboprop aircraft engine produced by Walter Aircraft Engines of the Czech Republic. The company's first turboprop, the M601 is used in business, agricultural and military training aircraft.

The turboprop was designed for use on the Let L-410 and the M601 first ran in 1967. It was not suitable for the prototype L-410 and the company developed an upgraded version, the M601A, with a slightly wider diameter.

Variants:M601AInitial production variant for early version of the Let L410.

M601BProduction variant for the Let L410UVP.

M601DDeveloped for the Let L410UVP.

M601D-1Agricultural variant for high-cycle operation, used on the PZL Kruk and Ayres Thrush.

M601D-2Special variant for paradrop aircraft, used on the Do 28 and some Finist conversions.

M601D-11Agricultural and paradrop variant with a higher Time Between Overhaul of up to 1800 hours.

M601D-11NZDownrated variant for use in the FU-24 Fletcher.

M601EDeveloped for the Let L410UVP-E.

M601E-11General use engine with sub-variants of differing TBO.

M601E-11AVariant of the 11 for use at higher operating altitudes and modified with a low pressure bleed air system for pressurised aircraft.